234 lines
7.6 KiB
JavaScript
234 lines
7.6 KiB
JavaScript
// GoatCounter: https://www.goatcounter.com
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// This file (and *only* this file) is released under the ISC license:
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// https://opensource.org/licenses/ISC
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(function() {
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'use strict';
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if (window.goatcounter && window.goatcounter.vars) // Compatibility
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window.goatcounter = window.goatcounter.vars
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else
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window.goatcounter = window.goatcounter || {}
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// Get all data we're going to send off to the counter endpoint.
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var get_data = function(vars) {
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var data = {
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p: (vars.path === undefined ? goatcounter.path : vars.path),
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r: (vars.referrer === undefined ? goatcounter.referrer : vars.referrer),
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t: (vars.title === undefined ? goatcounter.title : vars.title),
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e: !!(vars.event || goatcounter.event),
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s: [window.screen.width, window.screen.height, (window.devicePixelRatio || 1)],
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b: is_bot(),
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q: location.search,
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}
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var rcb, pcb, tcb // Save callbacks to apply later.
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if (typeof(data.r) === 'function') rcb = data.r
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if (typeof(data.t) === 'function') tcb = data.t
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if (typeof(data.p) === 'function') pcb = data.p
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if (is_empty(data.r)) data.r = document.referrer
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if (is_empty(data.t)) data.t = document.title
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if (is_empty(data.p)) data.p = get_path()
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if (rcb) data.r = rcb(data.r)
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if (tcb) data.t = tcb(data.t)
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if (pcb) data.p = pcb(data.p)
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return data
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}
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// Check if a value is "empty" for the purpose of get_data().
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var is_empty = function(v) { return v === null || v === undefined || typeof(v) === 'function' }
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// See if this looks like a bot; there is some additional filtering on the
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// backend, but these properties can't be fetched from there.
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var is_bot = function() {
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// Headless browsers are probably a bot.
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var w = window, d = document
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if (w.callPhantom || w._phantom || w.phantom)
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return 150
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if (w.__nightmare)
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return 151
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if (d.__selenium_unwrapped || d.__webdriver_evaluate || d.__driver_evaluate)
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return 152
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if (navigator.webdriver)
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return 153
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return 0
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}
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// Object to urlencoded string, starting with a ?.
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var urlencode = function(obj) {
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var p = []
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for (var k in obj)
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if (obj[k] !== '' && obj[k] !== null && obj[k] !== undefined && obj[k] !== false)
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p.push(encodeURIComponent(k) + '=' + encodeURIComponent(obj[k]))
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return '?' + p.join('&')
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}
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// Show a warning in the console.
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var warn = function(msg) {
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if (console && 'warn' in console)
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console.warn('goatcounter: ' + msg)
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}
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// Get the endpoint to send requests to.
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var get_endpoint = function() {
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var s = document.querySelector('script[data-goatcounter]');
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if (s && s.dataset.goatcounter)
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return s.dataset.goatcounter
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return (goatcounter.endpoint || window.counter) // counter is for compat; don't use.
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}
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// Get current path.
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var get_path = function() {
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var loc = location,
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c = document.querySelector('link[rel="canonical"][href]')
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if (c) { // May be relative or point to different domain.
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var a = document.createElement('a')
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a.href = c.href
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if (a.hostname.replace(/^www\./, '') === location.hostname.replace(/^www\./, ''))
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loc = a
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}
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return (loc.pathname + loc.search) || '/'
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}
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// Filter some requests that we (probably) don't want to count.
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goatcounter.filter = function() {
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if ('visibilityState' in document && (document.visibilityState === 'prerender' || document.visibilityState === 'hidden'))
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return 'visibilityState'
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if (!goatcounter.allow_frame && location !== parent.location)
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return 'frame'
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if (!goatcounter.allow_local && location.hostname.match(/(localhost$|^127\.|^10\.|^172\.(1[6-9]|2[0-9]|3[0-1])\.|^192\.168\.)/))
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return 'localhost'
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if (!goatcounter.allow_local && location.protocol === 'file:')
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return 'localfile'
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if (localStorage && localStorage.getItem('skipgc') === 't')
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return 'disabled with #toggle-goatcounter'
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return false
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}
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// Get URL to send to GoatCounter.
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window.goatcounter.url = function(vars) {
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var data = get_data(vars || {})
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if (data.p === null) // null from user callback.
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return
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data.rnd = Math.random().toString(36).substr(2, 5) // Browsers don't always listen to Cache-Control.
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var endpoint = get_endpoint()
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if (!endpoint)
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return warn('no endpoint found')
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return endpoint + urlencode(data)
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}
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// Count a hit.
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window.goatcounter.count = function(vars) {
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var f = goatcounter.filter()
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if (f)
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return warn('not counting because of: ' + f)
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var url = goatcounter.url(vars)
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if (!url)
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return warn('not counting because path callback returned null')
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var img = document.createElement('img')
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img.src = url
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img.style.position = 'absolute' // Affect layout less.
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img.setAttribute('alt', '')
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img.setAttribute('aria-hidden', 'true')
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var rm = function() { if (img && img.parentNode) img.parentNode.removeChild(img) }
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setTimeout(rm, 3000) // In case the onload isn't triggered.
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img.addEventListener('load', rm, false)
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document.body.appendChild(img)
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}
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// Get a query parameter.
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window.goatcounter.get_query = function(name) {
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var s = location.search.substr(1).split('&')
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for (var i = 0; i < s.length; i++)
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if (s[i].toLowerCase().indexOf(name.toLowerCase() + '=') === 0)
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return s[i].substr(name.length + 1)
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}
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// Track click events.
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window.goatcounter.bind_events = function() {
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if (!document.querySelectorAll) // Just in case someone uses an ancient browser.
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return
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var send = function(elem) {
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return function() {
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goatcounter.count({
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event: true,
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path: (elem.dataset.goatcounterClick || elem.name || elem.id || ''),
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title: (elem.dataset.goatcounterTitle || elem.title || (elem.innerHTML || '').substr(0, 200) || ''),
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referrer: (elem.dataset.goatcounterReferrer || elem.dataset.goatcounterReferral || ''),
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})
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}
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}
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Array.prototype.slice.call(document.querySelectorAll("*[data-goatcounter-click]")).forEach(function(elem) {
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if (elem.dataset.goatcounterBound)
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return
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var f = send(elem)
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elem.addEventListener('click', f, false)
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elem.addEventListener('auxclick', f, false) // Middle click.
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elem.dataset.goatcounterBound = 'true'
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})
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}
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// Add a "visitor counter" frame or image.
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window.goatcounter.visit_count = function(opt) {
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opt = opt || {}
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opt.type = opt.type || 'html'
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opt.append = opt.append || 'body'
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opt.path = opt.path || get_path()
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opt.attr = opt.attr || {width: '200', height: (opt.no_branding ? '60' : '80')}
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opt.attr['src'] = get_endpoint() + 'er/' + encodeURIComponent(opt.path) + '.' + opt.type + '?'
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if (opt.no_branding) opt.attr['src'] += '&no_branding=1'
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if (opt.style) opt.attr['src'] += '&style=' + encodeURIComponent(opt.style)
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var tag = {png: 'img', svg: 'img', html: 'iframe'}[opt.type]
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if (!tag)
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return warn('visit_count: unknown type: ' + opt.type)
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if (opt.type === 'html') {
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opt.attr['frameborder'] = '0'
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opt.attr['scrolling'] = 'no'
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}
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var d = document.createElement(tag)
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for (var k in opt.attr)
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d.setAttribute(k, opt.attr[k])
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var p = document.querySelector(opt.append)
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if (!p)
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return warn('visit_count: append not found: ' + opt.append)
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p.appendChild(d)
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}
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// Make it easy to skip your own views.
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if (location.hash === '#toggle-goatcounter')
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if (localStorage.getItem('skipgc') === 't') {
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localStorage.removeItem('skipgc', 't')
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alert('GoatCounter tracking is now ENABLED in this browser.')
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}
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else {
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localStorage.setItem('skipgc', 't')
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alert('GoatCounter tracking is now DISABLED in this browser until ' + location + ' is loaded again.')
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}
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if (!goatcounter.no_onload) {
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var go = function() {
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goatcounter.count()
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if (!goatcounter.no_events)
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goatcounter.bind_events()
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}
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if (document.body === null)
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document.addEventListener('DOMContentLoaded', function() { go() }, false)
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else
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go()
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}
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})();
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